is 2 25002793 - 1
has 7526591 decimal digits
takes 21.426 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2823B3DBA7185244double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27119.121064.7887%27000034425000.55033.2148%19.671365.9207%1.1320%
PrimeNet2660.590762.1212%11000040000000.40004.9776%0.990764.0067%1.8855%
GPU722709.557064.2857%18000050000000.55003.6603%10.106965.5930%1.3073%
Difference+1+9.5640+0.5030%+90000-1557500+0.0003-0.4455%+9.5643+0.3277%+0.3277%

Known prime factors (1 factor, 69.0 bits, 0.00027580% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
250027935734997958155316260332168.95811468714631512
23 × 29 × 53 × 932719147
2011-12-19539327191473.332163.144117.94

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-07-26T00:00:00ANONYMOUSv4_computers2700003442500---0.550--3.215%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-12-19T13:09:00Carsten KossendeyManual testing??68.958210.94843.651.932
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2001-08-24T00:00:00Mattv4_computers21258--0.002--
2001-12-01T00:00:00Mattv4_computers21259--0.003--
2001-12-01T00:00:00Mattv4_computers21260--0.006--
2004-03-26T00:00:00korvav4_computers21267--1.188--
2011-12-12T12:09:00David CampeauManual testing267268--1.196--
2011-12-19T13:08:00Carsten KossendeyManual testing268271--16.74--


ECM factoring results:
No ECM results for M25002793


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-10-03T00:00:00ANONYMOUSv4_computers2823B3DBA718524421.43


PRP results:
No PRP results for M25002793


P-1 factor-bounds graph:
B1 = 270000, B2 = 3442500 (P-1 stage 2)
B1 = 270000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2011-12-19T13:09:00+00:00